22c6962aa2
git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@1002 331e1502-861f-0410-8da2-ba01fb791d7f
93 lines
3.1 KiB
TeX
93 lines
3.1 KiB
TeX
\documentclass[a4paper]{article}
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\usepackage[english]{babel}
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\usepackage{epsf}
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\usepackage{amssymb}
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\usepackage{here}
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\usepackage{comment}
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\usepackage{graphicx}
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\topmargin -2.5cm
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\textheight 25,5cm
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\textwidth 16cm
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\oddsidemargin 0cm
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\begin{document}
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\textbf{ParadisEO Practices} {\copyright Franck Seynhaeve,
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Jean-Charles Boisson, Thomas Legrand} \Large{\textbf{\\\\
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Lesson 5: Implement a genetic algorithm using ParadisEO}}
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\normalsize
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\vspace{-0,3cm}
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\section{Example}
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The archive {\tt paradiseo\_practices\_0208.tgz} installed
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on your computer contains a genetic algorithm implemented using ParadisEO-EO~
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(see {\tt gen\_algo} in the {\bf build/lesson5} directory).
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\medskip
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To run it, please go in {\bf build/lesson5} and start the program {\tt gen\_algo} by giving
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one of the TSP instances located in {\bf tsp/benchs}.
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\medskip
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When entering {\tt ./gen\_algo ../../tsp/benchs/berlin52.tsp}, you should end up with the
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following outputs:
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\smallskip
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\noindent
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\texttt{>> Loading [../tsp/benchs/berlin52.tsp]}\\
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\texttt{[From] -26461 52 39 12 29 44 2 26 13 40 7 35 14 28 25 41 6 51 10 50 45 19 0 38 15}\\
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\texttt{33 42 21 18 32 37 9 5 20 34 43 16 30 1 23 22 4 27 36 4946 47 48 11 17 8 31 24 3}\\
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\texttt{STOP in eoGenContinue: Reached maximum number of generations [1000/1000]}\\
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\texttt{[To] -13068 52 45 24 28 22 19 21 30 17 31 36 46 25 13 12 26 27 51 10 14 37 23 4 15 49}\\
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\texttt{20 2 8 42 50 11 47 39 38 35 34 44 18 40 9 7 32 3 5 33 16 41 6 1 29 0 48
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43} \\
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\medskip
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The printed-out results show for the initial best solution and the final one~:
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\\ \hspace*{1cm}-the length of the route
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\\ \hspace*{1cm}-the number of cities
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\\ \hspace*{1cm}-the route itself (notice that the city index starts from 0).
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\section{Study the genetic algorithm dedicated components}
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Study the {\tt gen\_algo.cpp} file located in the {\bf lesson5} directory
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using~:
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\begin{itemize}
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\item[$\bullet$] the ParadisEO-EO API documentation available at~:
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\hspace{1cm}http$\,:$//eodev.sourceforge.net/eo/doc/html/index.html
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\item[$\bullet$] the source files located in the {\bf tsp/src/} directory
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\end{itemize}
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\section{Customize the GA}
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Make a backup (copy) of the cpp file {\tt gen\_algo.cpp}. You can now modify the
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original {\tt gen\_algo.cpp} and use the existing makefiles to compile it.
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Edit and modify the {\tt gen\_algo.cpp} file~:
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\begin{itemize}
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\item[$\bullet$] Try to tune a few parameters of the GA
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(selection criteria, stopping criteria ...).
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\item[$\bullet$] Then, try to change the initialization of the population
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by applying one of the local searches on each individual.
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\end{itemize}
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\smallskip
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To compile {\tt gen\_algo.cpp},you should use the
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command {\tt make} from {\bf build/lesson5}.
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\medskip
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Finally, test your modifications on several TSP instances ({\tt berlin52},
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{\tt eil101} ...) and compare the results you get.
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\end{document}
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